Prospective of nanolubricants and nano refrigerants on energy saving in vapour compression refrigeration system – A review

Senthilkumar, A.; Anderson, A.; Praveen, R.

doi:10.1016/j.matpr.2020.06.416

Cited by 15 publications

(3 citation statements)

References 26 publications

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“…), the type of nanoparticles (Al2O3, ZnO, TiO2 etc.) and the concentration of nanoparticles [53]. For instance, Adelekan et al [54] tested the combination of TiO2 nanoparticles with R600a (isobutane) refrigerant with different concentrations of nanoparticles and of refrigerant.…”

Section: Research Challengesmentioning

confidence: 99%

The status of refrigeration techniques for vaccine storage and transportation in low-income settings

Cattin¹,

Jonnalagedda²,

Makoliso³

et al. 2020

Preprint

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Vaccines need to be continuously stored between 2°C to 8°C, from their production to administration to beneficiaries. Every year, more than 25% of vaccines are wasted. One of the main reasons for this wastage is the lack of cold chain continuity in low-income settings, where electricity is scarce. Recently, several advances have been made in cooling technologies to store and transport vaccines. The current paper presents a review of refrigeration technologies based on scientific publications, industry white papers and other grey literature. For each refrigeration method, we describe its working principle, the best performing devices available as well as the remaining research challenges in order to obtain a very high degree of performance enhancement. Finally, we comment on their applicability for vaccine transport and storage.

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Section: Research Challengesmentioning

confidence: 99%

The status of refrigeration techniques for vaccine storage and transportation in low-income settings

Cattin¹,

Jonnalagedda²,

Makoliso³

et al. 2020

Preprint

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“…The solubility and miscibility of the coolant-oil mixture with nanoparticle additives was improved by up to 12 % and showed a 24 % COP improvement. On the other hand, Senthilkumar [19] in their prospective study of nanolubricants and nanorefrigerants on energy savings in the vapor compression refrigeration system point out that, in the R410A refrigeration system, COPs of 4 were obtained, likewise a 8 % with 0.1 % and 0.5 % and 7 % cooling capacity using diamond nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Flow Patterns in Two Nanorefrigerants R600a/CuO and R410A/CuO During the Boiling Process

Toapanta-Ramos,

Suquillo,

Cornejo

2024

Enfoque UTE

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The present study aims to know the flow patterns in two nanorefrigerants R600a / CuO and R410A / CuO throughout the forced boiling process in horizontal square pipes. Those are obtained using the thermophysical properties of the refrigerants R600a and R410A in state liquid and vapor, as well as the properties of the CuO nanoparticles. The analysis was carried out using two methods: analytical and numerical. The analytical method was established by formulas and correlations through scientific articles and books to find an improvement in the two-phase heat transfer, under the conditions at an inlet temperature of 8 ° C and with a quality range of 0 to 1. This allowed to verify that by adding nanoparticles to the refrigerant, the transition between the flow regimes increases progressively, while the quality of the vapor decreases. For the numerical method, the different transition limits are specified in a simulation process in the Ansys Fluent CFD Software, under established design conditions, which consequently increases the general efficiency of any refrigeration system.

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“…Jatinder et al [15] performed experiment in R600a refrigerator and resulted in increase in cooling effect of 17.39 percent and COP by 62.54 percent compared to LPG refrigerator.Senthilkumar et al [16] performed review, studied the effect of various nanorefrigerants and nanolubricants at various mass charges and concentrations, and clearly explained how it influences the improvement in COP and cooling effect and decrease in energy used by compressor. Jatinder gill et al [17] used TiO 2 nanoparticles in the LPG refrigerator and observed that increase in COP and cooling effect by 10.15 to 61.49 percent and 18.74 to 31.72 percent in comparison with R134a refrigerator.Raghunatha reddy et al [18] implemented the ANN technique and used backward back propagation and levenberg training and predicted the variables COP, cooling effect and power consumed by the compressor.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of R600a blended with various quantities of CuO, Al2O3 and SiO2 nanoparticles

Senthilkumar¹,

Gnana²,

Athimoolam³

et al. 2022

Zaštita materijala

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In this work three different nanoparticle concentrations of CuO, Al2O3, and SiO2 are dispersed in R600a vapour compression refrigeration system. The experiment was carried out using nanolubricant concentrations of 0g/L, 0.2g/L, and 0.4g/L having CuO, Al2O3, and SiO2 nanoparticles diffused in mineral oil with refrigerant mass fractions of 30, 40, and 60g. Nano lubricant was prepared at various concentrations using CuO, Al2O3, and SiO2 nanoparticles and refrigerant mass charges which were employed to perform tests. The system's performance was investigated with the variables such as coefficient of performance, refrigeration effect, compressor work, and pull down test. As a result of this study, it can be inferred that there is a significant enhancement in COP value of 2.7 by utilizing 0.4g/L SiO2 nanolubricant concentration with 40g of refrigerant. This inclusion of nanolubricant enhanced the refrigeration effect up to180W and resulted in a reduction of compressor work to 60W.The results obtained by using nanolubricants are compared with the system without nanolubricants. The pull down test with 0.4g/L SiO2 nanolubricant concentration quickly achieved low evaporator temperature compared to other conditions. The research was performed with various nanoparticles in R600a refrigeration system, the experiments were conducted with different nanoparticles by varying nanoparticle concentrations and refrigerant mass charges. From the experiments it is observed that SiO2 nanolubricant results in enhanced COP and refrigerant effect,which can be used as a better alternative to a pure mineral refrigeration system. Among three nanoparticles, SiO2 resulted in better performance and refrigerating effect with 56% less power consumption.

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Prospective of nanolubricants and nano refrigerants on energy saving in vapour compression refrigeration system – A review

Cited by 15 publications

References 26 publications

The status of refrigeration techniques for vaccine storage and transportation in low-income settings

The status of refrigeration techniques for vaccine storage and transportation in low-income settings

Flow Patterns in Two Nanorefrigerants R600a/CuO and R410A/CuO During the Boiling Process

Evaluation of R600a blended with various quantities of CuO, Al2O3 and SiO2 nanoparticles

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